packages / hdkiller-pi-langfuse
promptextension Observability

@hdkiller/pi-langfuse

Production-grade Langfuse observability for Pi. Tracks prompts, turns, tools, and streaming assistant responses with native trace hierarchies, token usage, and cost monitoring.

No reviews yet

Install

$ pi install npm:@hdkiller/pi-langfuse

Installs from npm into ~/.pi/agent/. Add -l for project-local (.pi/). Manage with pi list / pi update / pi remove.

What this package can reach

Detected automatically from the source at version 0.2.2. This describes access, not safety — you decide whether it's appropriate for what the package claims to do.

  • 🤖
    Behavior — Changes how the agent thinks Modifies the system prompt, injects messages, or rewrites conversation context.
  • 📡
    Extension bus — Talks to other extensions Uses pi.events to emit or listen on a shared channel, so it can coordinate with — or be driven by — other installed extensions.
  • 📁
    Files — Reads files outside your project Touches paths beyond the working directory, such as your home folder.
  • Intercepts tools — Can block or rewrite tool calls Subscribes to tool_call/tool_result/input. Can change a command after you approved the one displayed.
  • 📡
    LLM traffic — Sees raw model API traffic Reads or replaces provider requests, headers or responses — including your prompts.
  • UI — Draws its own interface Renders widgets, footers, dialogs or full-screen views.

What it actually did when run

observed

Loaded in a sandbox with no network, a read-only filesystem and a recording stand-in for pi's API. This is what it called — not what the source suggests it might.

Events subscribed agent_endagent_startbefore_agent_startbefore_provider_requestcontextextension:settings:changed:pi-langfusemessage_endmessage_startmessage_updatemodel_selectpi-extension-settings:pi-langfuse:changedpi-extension-settings:readysession_compactsession_shutdownsession_starttool_calltool_execution_endtool_execution_starttool_execution_updatetool_resultturn_endturn_start

APIs called events.emitevents.onregisterCommandsessionManager.getSessionFilesessionManager.getSessionFile.splitsessionManager.getSessionFile.split.popsessionManager.getSessionFile.split.pop.replaceui.notify

6 calls the source scan did not predict

events.emit · on("extension:settings:changed:pi-langfuse") · on("pi-extension-settings:pi-langfuse:changed") · sessionManager.getSessionFile.split · sessionManager.getSessionFile.split.pop · sessionManager.getSessionFile.split.pop.replace

Reached through a value the scan could not follow — passed as an argument, stored on another object, or returned by a helper.

Run against version 0.2.2 on 2026-08-02. Registration-time behaviour under default settings; other configurations may differ.

Review before you install. pi packages run with your full system permissions. Check the source, pin versions, and prefer authors you trust.

Reviews

0 published

Sign in with GitHub to write a review, reply, or vote.

No reviews yet — be the first.

More in Observability